<!DOCTYPE html>
<html>
  <head>
    <title>Blob Download Example</title>
  </head>
  <body>
    <script>
      const download = (data, filename) => {
      const a = document.createElement("a");
      a.style = "display: none";
      document.body.appendChild(a);
      a.style = "display: none";

      const blob = new Blob([data], { type: "octet/stream" });
      const url = window.URL.createObjectURL(blob);
      a.href = url;
      a.download = filename;
      a.click();
      window.URL.revokeObjectURL(url);
      document.body.removeChild(a);
    };

    const downloadIt = () => {
      download("Hello world", "example.txt");
    }
    </script>
    <a onclick="javascipt:downloadIt();">Download</a>
  </body>
</html>
